Heat and Heart Health in Dallas | Neighborhood Medical

Heat and Heart Health: Who Is at Risk?

Hot weather can do more than make you uncomfortable. It can place extra stress on the heart, especially during long stretches of high temperatures, humidity, outdoor activity, or poor hydration. When the body gets hot, the heart works harder to help move blood toward the skin so the body can release heat. At the same time, sweating can lead to fluid loss, which may make circulation more difficult.

For many healthy adults, summer heat is manageable with common-sense precautions. For others, heat can increase the risk of dizziness, fatigue, dehydration, shortness of breath, chest discomfort, or worsening symptoms related to an existing condition. That is why patients with heart concerns, high blood pressure, diabetes, obesity, or certain medication routines should be more careful during the summer months.

At Neighborhood Medical Center in Dallas, Texas, Dr. Martin McElya helps patients understand how seasonal changes can affect their overall health, especially when heat, chronic conditions, and daily habits overlap.

How Does Heat Affect the Heart?

Heat affects the heart by making it work harder to regulate body temperature. When temperatures rise, the body sends more blood toward the skin to cool itself, which can increase the heart’s workload and affect blood pressure, especially if dehydration sets in.

Humidity can add more strain because sweat does not evaporate as easily, making it harder for the body to cool down. This may leave some patients feeling weak, lightheaded, overheated, or unusually tired.

Summer heat can also affect people taking blood pressure medications, diuretics, or other prescriptions that influence fluid balance or circulation. For patients in Dallas, Garland, and Plano, hot weather is a reminder to stay hydrated, avoid peak heat when possible, and pay attention to new or worsening symptoms.

Who Is Most at Risk During Hot Weather?

People most at risk during hot weather include adults with heart disease, high blood pressure, diabetes, obesity, kidney concerns, or a history of heat-related illness. Older adults, especially those 65 and older, may also have a harder time regulating temperature and staying hydrated.

Higher-risk groups may include:

• Adults with heart disease or high blood pressure
• Older adults, especially those 65 and older
• People taking diuretics or blood pressure medications
• Individuals with obesity, diabetes, or kidney concerns
• People who work, exercise, or spend long periods outdoors

Outdoor workers, athletes, and active adults may also underestimate how quickly heat can affect the body. Even people who feel strong and healthy can become dehydrated or overheated when temperatures are high. This is especially true during midday heat, long outdoor events, yard work, sports, or exercise without enough breaks.

Dr. McElya often reminds patients that heat safety should be practical, not fear-based. “The goal is not to avoid summer completely,” says Dr. McElya. “The goal is to know your risk, listen to your body, and make smart adjustments before heat turns into a medical problem.”

Heat Warning Signs That Should Not Be Ignored

Some heat-related symptoms may start subtly. A person may feel more tired than usual, slightly dizzy, nauseated, weak, or unusually thirsty. They may also notice a headache, muscle cramps, heavy sweating, clammy skin, or a racing heartbeat.

Warning signs may include:

• Dizziness, weakness, confusion, or fainting
• Chest discomfort, shortness of breath, or irregular heartbeat
• Nausea, headache, muscle cramps, or extreme fatigue
• Hot, dry skin or heavy sweating that suddenly stops
• Symptoms that worsen instead of improving with rest and cooling

Chest pain, severe shortness of breath, confusion, fainting, or signs of heat stroke should be treated as urgent. These symptoms require immediate medical attention.

Patients with existing heart disease or blood pressure concerns should also be cautious if they feel dramatically different in the heat than they normally do. A symptom that seems minor at first may become more serious when dehydration, medication effects, and high temperatures are involved.

Simple Ways to Protect Your Heart in the Heat

Heart health during summer starts with planning. Avoid outdoor activity during the hottest part of the day when possible, and choose early morning or evening for walking, exercise, yard work, or errands. Lightweight clothing, shade, cooling breaks, and hydration can also help reduce strain.

Drink water regularly, not only when you feel thirsty. Patients with heart failure, kidney disease, fluid restrictions, or complex medication plans should ask their medical provider how much hydration is appropriate.

Limit alcohol in extreme heat, avoid overexertion, check the heat index, and take symptoms seriously. If heat makes heart-related symptoms, blood pressure concerns, dizziness, or shortness of breath worse, scheduling a visit with Dr. Martin McElya at Neighborhood Medical Center in Dallas, Texas can help you better understand your risk and make a safer summer health plan.

Published by Neighborhood Medical Center | Dr. McElya | Serving Dallas and DFW Communities | 972-726-6464

Educational purposes only. Not medical advice.